Casio G-Shock Analog-Digital Resin Band Wrist Watch GA-100-1A1 (Black Watch With Black Dial).
Casio G-Shock Analog-Digital Resin Band Wrist Watch GA-100-1A2 (Black Watch With Blue Dial).
Casio G-Shock Analog-Digital Resin Band Wrist Watch GA-100-1A4 (Black Watch With Red Dial).

Case size (L× W× H) : 55 × 51.2 × 16.9 mm
Weight : 70 g
Case and bezel material : Resin
Resin Band
Shock Resistant
Magnetic Resistant
200-meter water resistance
Power supply and battery life : Approx. battery life: 2 years on CR1220
Mineral Glass
World time
29 time zones (48 cities + coordinated universal time)
1/1000-second stopwatch
Measuring capacity: 99:59’59.999”
Measuring modes: Elapsed time, lap time, split time
5 daily alarms (with 1 snooze alarm)
Hourly time signal
Countdown timer
LED light
Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow
LED:Amber
Full auto-calendar (to year 2099)
Accuracy: ±15 seconds per month
12/24-hour format
Regular timekeeping:
Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (speed)
Digital: Hour, minute, second, pm, month, date, day